2.2 Task 2 - Concept Definition 2-9 2.2.1 Mission Analysis 2-9 2.2.2 Antenna Structural Definition 2-9 2.2.3 Configuration Analysis 2- 14 2.2.4 Assembly 2-21 2.2.5 Cost 2-31 2.3 Recommendations 2-33 L TECHNICAL DISCUSSION 31. Mission Analysis 3. 1-1 3.1.1 SSPS Configuration and Flight Mode Descriptions 3. 1-1 3.1.2 Transportation System Performance 3. 1-1 3.1.3 Altitude Selection 3. 1-8 3.1.4 SEPS (Ion Engine) Sizing 3. 1—14 3.2 Antenna Structural Concept 3. 2-1 3.2.1 General Arrangement 3. 2- 1 3.2.2 Rotary Joint 3.2-1 3.2.3 Primary/Secondary Antenna Structure 3. 2- 15 3.2.4 Structure/Waveguide Interface 3. 2- 15 3.2.5 Antenna Weight and Mass Properties 3.2-18 3.3 Configuration Analysis 3. 3 - 1 3.3.1 Control Analysis 3. 3-1 3.3.2 Thermal Evaluation 3. 3-9 3.3.3 Structural Analysis 3. 3-41 3.4 Assembly and Packaging 3.4-1 3.4.1 Detail Parts 3.4-1 3.4.2 Structural Assembly 3.4-9 3. 5 Cost 3. 5. 1 3.5.1 Task 1 - Preliminary Design Results 3. 5-1 3.5.2 Task 2 - Concept Definition Results 3.5-5 3.5.3 MPTS Structural Costs 3. 5- 19
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